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A sexually transmitted infection usually thought of in connection with cervical cancer also is
tied to a five-times-greater risk of cancer of the vocal cords, according to a Chinese study.

Chinese researchers, whose work appears in the
Journal of Infectious Diseases, combined the results of 55 studies from the past two decades and found that 28 percent of
people with laryngeal cancers had cancerous tissue that tested positive for human papilloma virus.

But that rate varied widely by study, from no throat cancer patients with HPV to 79 percent
with the infection.